论文部分内容阅读
采用原位反应铸造法制备出碳化物颗粒混杂增强钢基复合材料,并采用力学性能试验机、光学显微镜、带能谱的扫描电镜和XRD等检测手段研究了淬火温度对复合材料组织、性能的影响。结果表明:复合材料的硬度随淬火温度的升高而逐渐降低,冲击韧性随淬火温度的升高先增加后降低。920℃淬火处理后复合材料综合力学性能最好,硬度值达到54.3 HRC,冲击韧性值达到9.0 J·cm~(-2)。较860℃淬火硬度值降低了6.5%,而冲击韧性值提高了114.3%。复合材料的组织为片状马氏体、VC和(Ti·V)C颗粒。热处理后的复合材料的断裂形式为解理断裂,铸态试样断裂类型为沿晶断裂。
The in-situ reaction casting method was used to prepare the carbide matrix reinforced composite. The effects of quenching temperature on the microstructure and properties of the composites were studied by mechanical testing machine, optical microscope, scanning electron microscopy with X-ray diffraction and XRD. influences. The results show that the hardness of the composites decreases with the increase of quenching temperature, and the impact toughness increases first and then decreases with the increase of quenching temperature. The mechanical properties of the composites after quenching at 920 ℃ are the best, the hardness reaches 54.3 HRC and the impact toughness reaches 9.0 J · cm ~ (-2). Quenched than 860 ℃ hardness value decreased by 6.5%, while the impact toughness value increased by 114.3%. The composites were composed of lamellar martensite, VC and (Ti · V) C particles. The fracture morphology of the composite after heat treatment is cleavage fracture, and the fracture type of the as-cast sample is intergranular fracture.